Chaeles fulton



UNITED STATES PATENT OFFICE.

CHARLES FULTON, oF'nEw YORK, N. Y.

MANUFACTURING PAPER-PULP FROM PINE-LEAVES.

SPECIFICATION forming part of Letters Patent No. 224,170, dated February3, 1880.

. Application filed May 3, 1879.

To all whom it may concern Be it known that I, CHARLES FULTON, of NewYork, in the county and State of New York,formerly of Toms River, Oceancounty, New Jersey, have invented a new and Improved Process ofManufacturing Paper- Pulp from Pine-Leaves, of which the following is apine-leaves into a steam-tight vessel, which,

at its lower part, communicates with asteamsupply pipe and at its upperpart with a worm, similar to a still. I shut oft access to the worm, andthen admit steam into the closed 7 vessel, so as to expose the fibers tothe effect of the steam under-pressure, and also to its moisture andheat. The steam serves, by its heat and pressure, to soften the fibersand to expel all resinous, oily, spirituous, and other matter from theirpores, and to vaporize such matter, but leaves the fibers intact. Whenthe fibers are properly softened and liberated.

from their original contents the passage to the worm is opened, so thatthe vaporized substances ma y escape for purposes of distillation,

as set forth in another application filed by me at the same time withthis, and to which I .made oath September 18, 1877. The fibers are nowremoved from the vessel or tank and worked into pulp in the mannerinwhich vegetable fibers are usually worked into pulp for making paper,papier-mach, or the like.

The pulp may be bleached by means of suitable chemicals.

I do not here broadly claim. the treatment of pine-leaves with steam, asthis is set forth in the other application filed by me, as hereinabovestated; but

I do claim- 1. The process of treating pine-leaves with steam underpressure, for converting leaves into fiber for the making of paper-pulp,substantially as specified.

2. The fiber produced from pine-leaves by ejecting resinous, oily, andspirituous substances therefrom, said fiber serving in the manufactureof paper-pulp, substantially as specified. p CHARLES FULTON. Witnesses:

F. v. BRIESEN, W. H. 0. SMITH.

